How to sterilize litter box for nesting box?

[ninjapoodles]

Our cats have been transitioned to living outdoors for some time now, and when I was putting the litterboxes away, it struck me how perfect they'd be for nesting boxes. They're the "corner" boxes, perfect size, with a perfect-sized door in the front.

The boxes are smooth and un-nicked on the inside. What is the best way to get them properly disinfected? Is a bleach solution sufficient?

 

[The Chicken Lady]

I would assume a thorough bleaching and scrubbing, then rinsing with a hose, and drying out in the warm sunshine would be perfect.

 

[ninjapoodles]

Thanks! I couldn't think of any reason it wouldn't be OK, but for all I know there's some bizarre cross-contaminant I'm not aware of.